[libxml2] (2 commits) Non-fast-forward update to branch ddkilzer/fix-integer-overflow-xmlBufferDump

[Nick Wellnhofer <nwellnhof src gnome org>]

The branch 'ddkilzer/fix-integer-overflow-xmlBufferDump' was changed in a way that was not a fast-forward 
update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  fd884c6... Fix integer overflow in xmlBufferDump()

Commits added to the branch:

  c14cac8... xmlBufAvail() should return length without including a byte (*)
  a6df42e... Fix integer overflow in xmlBufferDump()

(*) This commit already existed in another branch; no separate mail sent